00314nam a2200121Ia 450000500170000000800410001704100080005808200130006610000180007924500420009726000440013930000090018320260720174724.0260720s1989    xx            000 0 und d  aeng  a150 ELMR  aElmes David G  aResearch methods in psychology,3rd Ed  aNew yorkbWest publishing companyc1989  a396p